* {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-box {
  width: 100%;
  height: 46px;
  background-color: #1abc9c;
  color: #fff;
  line-height: 46px;
  text-align: center;
  position: fixed;
  top: 0;
  z-index: 100;
  font-size: 16px;
}

.message-box {
  margin-top: 60px;
}

.message-list-item {
  display: flex;
  height: 60px;
  align-items: center;
  background-color: #fff;
  margin: 10px 0;
}

.message-list-item img {
  width: 50px;
  height: 50px;
  border-radius: 5px;
  margin-left: 10px;
}

.message-list-item span {
  display: flex;
  align-items: center;
  height: 60px;
  width: 100%;
  margin-left: 10px;
  border-bottom: 1px solid #f6f6f6;
}